How to detect game launch?

Question

.NET

We have an application and we want to detect that the game is running, but before it goes into full screen mode or immediately when it goes into full screen mode. The name should be fixed, for example Game.exe
. Everything that a regular user has can be launched - Skype, browsers, but it is the game that needs to be caught.
we have administrator rights and we can rummage through the file system in advance if necessary.

Answer 1

Google -> winapi check if process running

Answer 2

In this case, it is more correct to prevent, and not to run through every fire.
To prevent - look towards SRP